Machine lubrication



July 31, 1928.

N. M. BAKER ncgmm LUBRICATION -Fi1ed March a, 1926 2 She'ets-Sheet 1 gn/uenliot nelson m. Baker. 1

I N. M. BAKER ucamr: LUBRIGATION Filed March 8, 1926 2 Sheets-Shoat 2 jmentoz l nelson mfiaker.

Patented July 31, 1928.

. v 1,679,199 PATENT. OFFICE.

NELSON M. BAKER, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR TO AHEBICANOP v TICAL COMPANY, OF SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSOCIA- TION OF MASSACHUSETTS.

mourns LuBnIoA'rIoiI.

Application filed much a, 1926. Serial No. 93,157.

The present invention relates to improvements in machme lubrlcation, and has particular reference to an'oil feed for the same.

The primary object of the invention is to provide means to properly and positively lubricate the working parts of machines, particularly the parts susceptible to wear by friction, and means whereby the lubricant ma be brought to continued use.

nother object of the invention is to provide means whereby a supply of lubricant may be contained within the machine, together with means whereby this lubricant may be circulated to all parts of the'machine requiring lubricatiom Another object of the invention is to provide lubricating means which will operate substantially automatically, requiring little or no attention from machine.

A further object is toprovide simple, inexpensive, stron and durable means efficiently adapted or the purposes specified.

Other objects and advantages, together with the details of-'construction and method of operation of this invention, will become apparent during the course of the following description taken in connection with the accompanying drawings, the preferred form only being shown by way of illustration. Many'changes in the details and arrangement of parts may be 'made without de-' parting from the s irit of the invention as set forth in the clalms, and I therefore, do

not wish to be limited only to those shown and described.

Referrin to the drawing 'in which like I numerals esignate like parts:

Figure 1 is a side elevation of a machine embodying the invention;

Figure 2 is a longitudinal sectional view on line 2-2 of Figure 1; I Figure 3 is a transverse sectional view on line H of Figure 2.

Heretofore most machines have been de-' pendent for lubrication on the thoughtfulness of the operator, who must lubricate his machine frequently by use of the old style oil can or upon an oil pump operatedby the machine and having a separate tube or pipeline leading therefrom to different parts of the machine that are to be lubricated. The latter is a very costl and unsatisfactory way of lubrication no to the failure the operator of the.

of the pump to operate properly by the quick wearing of the parts within the pump, and the clogging of the same.

It, therefore, becomes a most important I object of this invention to obviate these difficulties and to provide lubricating means which shall be substantially automatic, and which, shall properly and positively lubricate all the necessary points of contact, and which shall require little or no attention from the operator.

I have shown my invention a plied to a so-called hand grinding lens mac ine having a grinding tool or la 1 secured to the grinding shaft 2. The grinding shaft 2 is mounted in an upper bearing 3 and a lower bear- 111% 4 The object 0 this invention. is to In ricate the bearings 3 and 4'as well as other working parts to be described hereafter.

Surrounding the sl1aft2 is an oil well or tank 5 in which a supply of lubricating oil oil well 8 at. the bottom ofvthe shaft 2.

The shaft 2 is hollow, being, therefore, a tube; In the bore of the shaft 2 is placed a tubular rod 9 having" the bore 10 and a longitudinal slot or' roove 11 throughout its length on'the outside. There is asplace between the rod 9 and the inside of theollow shaft 2; In this-space and around the red 9 is placed a spiral member 12 extending from the bottom of the sh ft m top j the'rod' 9 at the top of the upper bearing 3. The spiral member 12 closely engages 3is an oilchamber 13 communicatingwith the bore of the shaft 2 through an opening 14 in the shaft walls. Leading from the oil chamber 13 is a passage 15 communicating with the oil wellor tank 5. Around the shaft 2 in the upper bearing 3 is. a spiral I 'the sides of the bore of the shaft 2 and turns" therewith. At the top of the upper bearing 14 into the chamber 13, thus flooding the top of the bearin The oil is carried down through the bearing 3 by the spiral groove 16as Well as by gravity; Some of the overflow of the oil at the bearing 3 comes back into the oil chamber 8 through the bore 10 of the central rod 9, and some of it flows back into the tank 5 through the passage from the chamber 13.

The rod 9 is held against rotation by the pin 17, on which the rod 9 is pivoted, as shown in Figure 2. The oil is driven up the slot 11 in the rod 9 by the advancing action ofthe rotating spiral member -12.

The shaft 2 is driven by the shaft 37 which is driven by the pulley 38 and belt 39. On the shaft 2 is a gear 40 driven by a gear 41 on the shaft 37. I The bearings 42 and 43 for the shaft 37 are located in the tank 5 beneath the surface of the oil 6, which seeps into the bearing through the openings 44 and is carried along the bearings by the spiral grooves 45 on the shaft 37, the oil being driven along a channel 46 in the bearings back into the tank 5.

The lenses are held on the lap 1 by the in 47 -in the usual lever 48 pivoted at 49.

he lap is surrounded by a protective pan 50. The driving shaft 2 is supported on a table 51.

While I have illustrated my invention as applied to a hand grinding lens machine it is apparent that the principles may be applie to other forms of bearing lubrication.

I have described the operations of my invention in describing the construction and spiral member parts of the machine, from which the construction and operation should be clear and from which it will be seen that I have provided simple, inexpensive and efficient means for carry] out the objects of the invention. Having ascribed my invention, I claim: 1. In a device of the character described,

a hollow shaft, bearin s for the shaft, a rod within the hollow sha having a longitudinal slot for the length of the rod on the outside thereof, a spiral member in the bore of the shaft and secured thereto, an oil well communicating with the spiral member, and means for rotating-lg the s aft whereby the drive the oil from the oil well along the longitudinal slot in the rod to the bearings.

2. In a device of the character described, a hollow shaft, bearings for the shaft, a rod within the hollow shaft having a central bore and a longitudinal slot for the length of the rod on the outside thereof, a spiral member in the bore of the shaft and secured'thereto, an oil well communicating with the spiral member, and means for rotating the shaft whereby the spiral member will drive the oil from the oil well along the longitudinal slot in the rod to the bearings.

3. In a device of the character described, a hollow shaft, bearings for the shaft, a rod within the hollow shaft, a spiral member around the rod secured to the shaft, an oil well communicating with the spiral member,

and means for rotating the shaft whereby the spiral member will drive the oil from the oil well to the bearings.

4. In a device of the character described,-

ing an opening adjacent the bearing, means to turn the shaft, an oil tank having an oil channel leading to one end of the shaft, an annular spiral oil carrier secured within the shaft to turn therewith, a rod in the spiral member having a longitudinal slot whereby the oil is carried from Y the oil channel through the opening in the shaft to the bearing by the spiral member and the slot in the rod as the shaft is turned.

5. In a device-of the characterdescribed,

a bearin having an oil feed openin and an oil overffim opening therein, a tubu ar shaft in the bearing havin an opening communieating with the bearing, means to turn the shaft, an oil tank communicating at onea bearing, a tubular shaft in the bearing hav- 

